"Learning that three of our members, two of whom were white, had disappeared really blew away all my ideas that possibly we would have protection from the fact that the majority of the summer volunteers were white. I knew now that that was not the case: that everybody was in grave danger, and that these Mississippians would kill all of us, white and black." Watch "Freedom Summer" premiering June 24, 2014 on PBS.
The trial of nine falsely accused African American teens in Alabama would draw North and South into their sharpest conflict since the Civil War.
The first woman to fly solo across the Atlantic, Earhart disappeared in 1937 during an attempt to circumnavigate the world by airplane.
Roman Catholic priest Father Charles Coughlin used the power of radio to rail against the nation's economic system in the Depression.
Marcus Garvey, a black nationalist leader from Jamaica, had great successes and failures before being jailed and deported from the US in 1927.
Clemente was an exceptional baseball player whose career sheds light on larger issues of immigration, civil rights and cultural change.
The acquittal of the murderers of Chicago teen Emmett Till mobilized the civil rights movement.
Murderer, martyr, hero - John Brown's violent crusade against slavery would divide the nation and spark the Civil War.
An African American minister whose dream of ending racism galvanized millions of Americans in the civil rights movement.